09Hardenability

09Hardenability - Measurement of Hardenability High...

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Measurement of Hardenability High Strength Low Alloy Steels (HSLA) Laboratory Experiment #9 MET231 Laboratory Report Requirements Each student will provide a memorandum style report that must include the following: The definition of “hardenability” 1 , the meaning of the term “base diameter (D I )” and an insert a graph of the hardness profile for an AISI/SAE 4140 steel found in the literature. 2 Discuss the significance of hardenability multiplying factors, as they relate to HSLA steels (see reference 2). In addition, provide the definitions of the words: martensite, bainite, cementite, pearlite and ferrite. In what order, from the quenched end of the Jominy end quench specimen, would the above listed microstructural features be observed. Introduction What is hardenability? The primary objective of austenitizing, quenching and tempering a steel part is to produce a hard martensitic microstructure in the material. The ease of accomplishing this task is a measure of the steel alloy’s hardenability. The higher the
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This note was uploaded on 01/30/2011 for the course EMSE 103 taught by Professor Ggh during the Spring '10 term at Case Western.

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09Hardenability - Measurement of Hardenability High...

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